Cylindrical convective air-cooling system

ABSTRACT

The method and system providing counter-flowing regime of a convective air-chilling of a fluid based on usage of a hollow fan is disclosed.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates generally to the air conditioningtechnique. Particularly, the present invention relates to the problem ofcooling of a fluid that is flowing through a round tube.

2. Description of the Related Art

The last decade of development of the integrated circuits, especiallyCPUs (Central Processing Unit) and GPUs (Graphic Processing Unit),evidently demonstrated that we have reached the limits of frequencies,at which the traditional air cooling of working processors can providereliable evacuation of the generated parasitic heat in order to keepsaid processors within safe domain of their temperatures. It becameclear that future progress in the increasing of working frequencies ofprocessors is possible only by implementation of the convective coolingof processors by the circulating fluid coolant, particularly water.Water cooling of servers already became a routine practice in the bigData Centers.

All implemented solutions for water cooling of computers are employingwell known and very traditional fans, the general front look of which isshown in FIG. 1. The usual method of the convective air cooling of afluid that is flowing into a pipe is the following: Using conventionalfan (object A in FIG. 1) and lattice of metallic fins welded to a roundpipe (object B—in face look, and C—in side look in FIG. 1), fan A isplaced in such way (object D—in face look, and D—in side look in FIG. 1)that chilling air is blowing in the direction, which is normal to thedirection of flow of the cooled fluid into the pipe.

However, the theory of the convective cooling teaches that the mostefficient method of cooling of one fluid by another fluid is that, whensaid fluids are propagating in opposite directions (not in normaldirections).

The object of present invention is the method and system that provides aconvective air chilling of a fluid, which is flowing in a pipe, inmanner when air blows in opposite direction to the direction of thefluid's flow.

SUMMARY OF THE INVENTION

It is an object of the present invention to teach the method and systemfor a convective cooling of a fluid by an ambient air in the regime ofcounter-flow of said substances.

The invented method and system are based on the usage of a novel designof the fan that creates a flow of the ambient air—with hole over itsaxis, around which the fan's blade-wheel is rotating.

BRIEF DESCRIPTION OF THE DRAWINGS

Advantages and features of the present invention are better understoodwith the reference to the following more detailed description and claimstaken in conjunction with accompanying drawings, in which like elementsare identified with like symbols.

FIG. 1 shows the schematics of the traditional manner of a convectiveair cooling of a fluid in a pipe.

FIG. 2 shows the schematics of the invented manner of a convective aircooling of a fluid in a pipe.

FIG. 3 shows the frontal look of the invented fan.

FIG. 4 shows the cross-section AA that is designated in FIG. 3.

FIG. 5 shows the drawing of detailed setting and assembling of theinvented hollow fan.

FIG. 6 shows the cross-section BB that is designated in FIG. 5 placedinside the magnet ring.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

The best mode for carrying out the invention is presented in terms ofits preferred embodiment, herein depicted within the Figures.

1. General Description

The manner of the convective air cooling of a fluid in the tubeaccording to the invented method and system is schematically illustratedin FIG. 2.

The basic element of entire invention is a hollow fan (object A in FIG.2). Further, the invention requires that the straight tube, which thecooled fluid is flowing through, should be equipped with a cassette ofmetallic fins—the metallic strips that are oriented along the radii ofthe used round tube (object B in FIG. 2—a lateral look, and object C inFIG. 2—a frontal look), which are enveloped by a metallic cylinder(object D in FIG. 2—a face look), and all said elements are forming awell heat-conducting cassette, which is in the best possible thermalcontact with said round tube (welded, soldered, glued, etc.; manner ofdoing that is not a subject of the present invention). It is recommendedto make enveloping cylinder having radii that is equal to radii of theblade wheel of the used hollow fan. Attaching the said hollow fan to thetube with said cassette on it as that is shown in FIG. 2 (object E—afrontal look, and object R—a lateral look) one gets a preferredembodiment of the present invention.

It is recommended to modify all inner surfaces of a used cassette with alattice of some irregularities (that bare not objects of the presentinvention) in order to enhance the heat exchange on the air streamlinedsurfaces.

2. Detailed Description

The FIG. 3 illustrates the preferred embodiment of the invented hollowfan, where a certain frame [001] for easy attachment to the cassettewith a cooled fluid is introduced. FIG. 4 shows a complete drawing ofcross-section AA that is designated in FIG. 3. For easier understandingthe setting and assembling of the invented hollow fan it is useful toconsider drawings in FIG. 5 together with main drawing in FIG. 4.

As FIG. 4 shows, the blades [002] of the invented fan are attached to ahollow cylindrical cup [003], and this setting provides the blade wheel(object e in FIG. 5). Said blade wheel is attached to the surface of anexternal ring of a bearing [004].

The ring of coils [006] (object d in FIG. 5) consist of set of coils intheir individual cartridges [009] each, and with individualferromagnetic (usually—made of iron plates) cores [005] inside eachcartridge. The cross-section BB (which is designated in FIG. 5) of saidring of coils is shown in FIG. 6. (Number of coils in differentembodiments can vary). The shape of coils' cartridges [009] is made suchthat cylinder

and the external ring of said bearing [004] do not touch said ring ofcoils when the ring of coils is sitting co-axially on the top of theinner ring of bearing [004]. Each cartridge [009] has two metallic pins[013] that are the electrodes to which the ends of coil are soldered.

The magnet ring [007] precisely fits the corresponding niche insidecylinder [003] and is fixed by the metal ring [008] placed on the top ofsaid magnet ring; both just mentioned rings do not touch the ring ofcoils [006] (object d in FIG. 5) that is sitting co-axially on the topof the inner ring of bearing [004].

The toroidal box [011] with electronics that manages a working electriccurrent in coils [006] (and which is not an object of the presentinvention), inside of it has a system of holes in its bottom that areexactly matching the set of pin-shaped electrodes [013] on the top ofeach coils' cartridge in the ring of coils (object in FIG. 5), so that,when said toroidal box [011] sits on the top of said ring of coils [006]all pin shaped [013] are passed through inside of the toroidal box [011]and can be soldered to mother board of an appropriate electronics thatis inside said box, just as it is shown as position [010] in FIG. 4.

As soon as all objects f, e, d, c, b and a, that shown in FIG. 5, areco-axially attached on each other in designated order, the frame [001]is added on the top of such setting and the metallic cylinder [012] goesinside the formed cylindrical hole of this setting and is sealed on itstop end into frame [001]. Entire construction becomes reliably sealedand blades wheel can freely rotate about the axis of symmetry of theentire construction. The same metallic cylinder [012] goes in the cornerholes in the used frame and is sealed on its top end into frame [001],which forms the cylindrical walls of this corner channel that can beused for a tube (not shown in Figures) that provides a back-flow of thecooled fluid.

3. The foregoing descriptions of specific embodiments of the presentinvention are made for purposes of illustration and description. Theyare not intended to be exhaustive or to limit the invention to preciseforms disclosed and, obviously, many modifications and variations arepossible in light of the aforementioned teaching. The embodiments arechosen and described in order to best explain principles of theinvention and its practical application, to thereby enable othersskilled in the art to best utilize the invention and its variousembodiments with various modifications as are suited to the particularuse contemplated. It is intended that a scope of the invention bedefined broadly by the Drawings and Specification appended hereto and totheir equivalents. Therefore, the scope of the invention is in no way tobe limited only by the following exemplary claims nor by any possible,adverse inference under the rulings of Warner-Jenkins Company, v. HiltonDavis Chemical, 520 US 17 (1997) or Festo Corp. V. Shoketsu KinzokuKogyo Kabushiki Co., 535 U.S. 722 (2002), or other similar case law orsubsequent precedent should not be made if such claims are amendedsubsequent to this Non-provisional (Utility) Patent Application.

Having thus described the invention what is claimed as new is asfollows:
 1. The method and system for a convective heat exchange ofbetween two fluids comprising: a tube for stream of the first workingfluid; a set of well heat-conducting flat fins that are stretched alonga central core and directed out of said core, while said core has a holeinside it that allows said tube for stream of the first working fluid tofit in, having a reliable heat-conductive contact with said core; acylindrical well heat-conducting envelope, inside which said tube withattached fins can be placed in such manner that free edge (which isopposite to the fin's edge that is contacting with said tube for streamof the first fluid) of each fin will come in a reliable (in order toprovide a good thermal contact with said envelope) contact with innersurface of said envelope; wherein said tube with said set of fins beingplaced inside said cylindrical envelope forms a cassette of channels:central one—inside said tube, and a multitude of sector-shaped channelsfor a second fluid, while each of these channels is stretched parallelto the said tube and has the surfaces of two neighbor fins as its sidewalls, external surface of said core as its bottom wall, and theinternal surface of said envelope as its top wall.
 2. The method andsystem of claim 1, further comprising said cassette and a fan that has aco-axial hole in its stator, around which a blade wheel can rotate,wherein the central tube of said cassette goes through fan's co-axialhole and rotating blade wheel of fan is pushing the ambient air throughset of the sector-shaped channels of said cassette.
 3. The hollow fan ofclaim 2 comprising: a straight regular bearing; a cylindrical cup withco-axial hole in its bottom that has a diameter matching to the externaldiameter of said bearing and due to which said cup can be attached tothe external surface of said bearing; set of blades that areequidistantly attached to said cylindrical cup's external side surface;a magnet ring that can be co-axially placed in a niche inside saidcylindrical cup, wherein said cylindrical cup with a magnet ring insideof it and said blades attached outside of it form a rotor of made bladewheel, which can freely rotate around said inner part of used bearing; aring of coils, each in a cartridge with a ferromagnetic core and pinshaped electrodes connected with ends of coil , that can be fitco-axially on the top of inner part of said bearing without touchingsaid blade wheel anywhere; a toroidal box with set of holes in itsbottom that are exactly matching the disposition of said pin shapedelectrodes and with electronics that is needed for managing the electriccurrent in coils; a thin metal cylinder for fixing entire setting to anappropriate frame; wherein said ring of coils is placed co-axially onthe top of said inner part of said blade wheel's bearing, said toroidalbox with electronics is co-axially placed on the top of said ring ofcoils, so that all pin shaped electrodes are passed into said box andare soldered there with needed points servicing an electric current, andno said object of setting does not touch any component of said rotor ofmade blade wheel, so that it can freely conduct an axial rotation, andentire setting is attached to the external frame by said tinny metalcylinder.